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    Subject2.2.7 Oops on SMP machine in __free_page() while loading executable
    This is from our SMP machine which has been experiencing bi-weekly
    silent freezes with kernels all the way back to 2.0.3x. This morning I
    actually got an Oops. I don't know if this is related to the silent
    freezes or not.

    I'm not subscribed to the list, so CC: me if you have any questions.

    Thanks,
    Mark

    # ./ksymoops -v /usr/src/linux-2.2.7/vmlinux -O -K -L oops.file
    Options used: -v /usr/src/linux-2.2.7/vmlinux (specified)
    -O (specified)
    -K (specified)
    -L (specified)
    -m /usr/src/linux/System.map (default)
    -c 1 (default)

    Unable to handle kernel NULL pointer dereference at virtual address 00000004
    current->tss.cr3 = 05df6000, %cr3 = 05ef6000
    *pde = 00000000
    Oops: 0002
    CPU: 1
    EIP: 0010:[<c01221b8>]
    EFLAGS: 00010012
    eax: 00000000 ebx: 00000333 ecx: ffffffff edx: 00000000
    esi: 00000666 edi: c02556e4 ebp: 00000206 esp: c5fa9c60
    ds: 0018 es: 0018 ss: 0018
    Stack: 000ab000 00000008 c0122b89 00000068 c61482d0 c011a2b8 c0666000 c6e15b60
    080ab000 c6af24c0 00071000 c0666000 00000000 0011c000 c5ef6080 00000000
    0811c000 c5ef6080 c011c16e c6af24c0 080ab000 00071000 c0817800 c5fa8000
    Call Trace: [<c0122b89>] [<c011a2b8>] [<c011c16e>] [<c012b128>] [<c012b27b>] [<c0133669>] [<c011d126>] [<c012b0db>] [<c012b7ef>] [<c012b9f8>] [<c0107a47>] [<c0108c00>]
    Code: 89 42 04 89 10 01 c9 83 c7 0c c1 eb 01 21 ce 81 f9 00 fe ff

    >>EIP: c01221b8 <__free_page+ac/ec>
    Trace: c0122b89 <free_page_and_swap_cache+5d/60>
    Trace: c011a2b8 <zap_page_range+144/1c4>
    Trace: c011c16e <exit_mmap+ae/10c>
    Trace: c012b128 <exec_mmap+3c/128>
    Trace: c012b27b <flush_old_exec+67/1e0>
    Trace: c0133669 <load_elf_binary+529/b54>
    Trace: c011d126 <do_generic_file_read+5f6/604>
    Trace: c012b0db <read_exec+16b/17c>
    Trace: c012b7ef <search_binary_handler+37/ac>
    Trace: c012b9f8 <do_execve+194/1d8>
    Trace: c0107a47 <sys_execve+4b/88>
    Trace: c0108c00 <system_call+34/38>
    Code: c01221b8 <__free_page+ac/ec> 00000000 <_EIP>: <===
    Code: c01221b8 <__free_page+ac/ec> 0: 89 42 04 movl %eax,0x4(%edx) <===
    Code: c01221bb <__free_page+af/ec> 3: 89 10 movl %edx,(%eax)
    Code: c01221bd <__free_page+b1/ec> 5: 01 c9 addl %ecx,%ecx
    Code: c01221bf <__free_page+b3/ec> 7: 83 c7 0c addl $0xc,%edi
    Code: c01221c2 <__free_page+b6/ec> a: c1 eb 01 shrl $0x1,%ebx
    Code: c01221c5 <__free_page+b9/ec> d: 21 ce andl %ecx,%esi
    Code: c01221c7 <__free_page+bb/ec> f: 81 f9 00 fe ff cmpl $0xfffe00,%ecx
    Code: c01221cc <__free_page+c0/ec> 14: 00

    /proc/version:

    Linux version 2.2.7 (root@mercury) (gcc version 2.7.2.3) #7 SMP Mon May 17 13:36:40 PDT 1999

    /proc/cpuinfo:

    processor : 0
    vendor_id : GenuineIntel
    cpu family : 6
    model : 5
    model name : Pentium II (Deschutes)
    stepping : 0
    cpu MHz : 331.927246
    cache size : 512 KB
    fdiv_bug : no
    hlt_bug : no
    sep_bug : no
    f00f_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx osfxsr
    bogomips : 330.96

    processor : 1
    vendor_id : GenuineIntel
    cpu family : 6
    model : 5
    model name : Pentium II (Deschutes)
    stepping : 0
    cpu MHz : 331.927246
    cache size : 512 KB
    fdiv_bug : no
    hlt_bug : no
    sep_bug : no
    f00f_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx osfxsr
    bogomips : 331.78

    This machine is not using modules.

    ver_linux:

    Linux mercury 2.2.7 #7 SMP Mon May 17 13:36:40 PDT 1999 i686 unknown
    Kernel modules 2.1.121
    Gnu C 2.7.2.3
    Binutils 2.9.1.0.15
    Linux C Library 2.0.7
    Dynamic linker ldd (GNU libc) 2.0.7
    Linux C++ Library 2.8.0
    Procps 1.2.9
    Mount 2.9
    Net-tools 1.50
    Kbd 0.96
    Sh-utils 1.16


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